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  <title>Clears IMAP cache</title>
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  <div id="layout-content"><div id="function.imap-gc" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">imap_gc</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7)</p><p class="refpurpose"><span class="refname">imap_gc</span> &mdash; <span class="dc-title">Clears IMAP cache</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.imap-gc-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>imap_gc</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$imap_stream</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$caches</code></span>
   ) : <span class="type">bool</span></div>

  <p class="para rdfs-comment">
   Purges the cache of entries of a specific type.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.imap-gc-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

     <dt>
<code class="parameter">
imap_stream</code></dt>
<dd>
<p class="para">由 <span class="function"><a href="imap_open.html" class="function">imap_open()</a></span> 返回的 IMAP 流。</p></dd>

    
     <dt>
<code class="parameter">caches</code></dt>

     <dd>

      <p class="para">
       Specifies the cache to purge. It may one or a combination
       of the following constants: 
       <strong><code>IMAP_GC_ELT</code></strong> (message cache elements), 
       <strong><code>IMAP_GC_ENV</code></strong> (envelope and bodies),
       <strong><code>IMAP_GC_TEXTS</code></strong> (texts).
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.imap-gc-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
  成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-function.imap-gc-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4020">
    <p><strong>Example #1 <span class="function"><strong>imap_gc()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />$mbox&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">imap_open</span><span style="color: #007700">(</span><span style="color: #DD0000">"{imap.example.org:143}"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"username"</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">"password"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">imap_gc</span><span style="color: #007700">(</span><span style="color: #0000BB">$mbox</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">IMAP_GC_ELT</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>

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